CN2371748Y

CN2371748Y - H-F sound column with high electroacoustic converting rate

Info

Publication number: CN2371748Y
Application number: CN 98232070
Authority: CN
Inventors: 林伟健
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-31
Filing date: 1998-12-31
Publication date: 2000-03-29
Anticipated expiration: 2008-12-31

Abstract

The utility model relates to an H-F sound column with high electroacooustic converting rate, which is a sound reproducing device. The utility model comprises a cylindrical housing, an upper cover, a pedestal, a tweeter, a mediant loudspeaker, a woofer which is coaxial with the cylindrical housing, a face mask of a sound column, two opposite tapered bass diffusers and two groups of annular bass sound outlet port, wherein, the cylindrical housing is provided with a bottom plate; the center of the bottom plate is provided with a circular hole; a phase-reversal tube which is coaxial with the circular hole of the bottom plate is erected at the upper surface of the bottom plate; the diameter of a tube hole of the phase-reversal tube is equal to the hole diameter of the circular hole of the bottom plate. The utility model has the advantages of wide frequency band, full diapason, particularly good frequency response of low-frequency resonance, pure sound quality, high electroacooustic converting rate and uniform directivity, and is an ideal sound column for families and music halls.

Description

The H-F sound column of high electroacoustic transfer ratio

The utility model relates to a kind of sound reproduction equipment, especially a kind of vertical cylindrical gamut H-F sound column.

The sound column kind that the audio amplifier, particularly stereo set of sound system use at present use is a lot, and each is different to some extent for version, and pluses and minuses are also respectively arranged.Closed audio amplifier be difficult to obtain enough LF-response, and nonlinear distortion is big, sensitivity is low because compressed-air actuated adjection rises the resonance frequency of loud speaker, and electro-acoustic conversion efficiency is low; The guiding theory of horn formula design mainly is in order to improve electroacoustic efficiency, and some in fact also is a kind of closed sound column, though some bass tone color is pure, the low frequency frequency response often has many peak valley points, and horn and sound basin link, and causes nonlinear distortion easily; Control directive property audio amplifier, even as polyhedron audio amplifier directive property, acoustical sound, but heavy volume is big, spherical case reflective sound wave interferes with each other, tonequality is adjusted difficulty, taper non-directive audio amplifier bandwidth but complex structure, low frequency Hz-KHz height, sound column directive property is strong, must careful adjust the position in the use and just there is optimum efficiency at the inclination angle, radially loudspeaker acoustic enclosure high pitch partial design becomes inverted phase type, and low frequency cell is provided with diffuser, and this audio amplifier has had both the characteristics of above-mentioned various audio amplifiers, volume is also little, but the middle pitch frequency response is poor.In sum, the various audio amplifiers that use not are perfect in every way at present, and are unsatisfactory in the use.

The utility model is to provide a kind of bandwidth, gamut frequency response, and especially low frequency is humorous well, distortion is little, highly sensitive, tonequality is pure, the high perpendicular cylinder gamut H-F sound column of the directive property all even electro-acoustic conversion efficiency of expansion.

The utility model comprises cylindrical housings, loam cake, base, loudspeaker, mediant trumpet, the bass horn coaxial with cylindrical housings, the sound column face shield, 2 relative taper bass diffusers and 2 groups of annular bass sound mouths, the axis of bass horn and 2 taper bass diffusers and 2 groups of annular bass sound mouths is positioned at the circular cylindrical shell body axis, 2 taper bass diffusers are bullet, the bullet vertex of a cone is relative, cylindrical housings has base plate, there is circular hole in base plate central authorities, plate upper surface is perpendicular to be equipped with the phase-reversing tube coaxial with central circular hole, and the pore of phase-reversing tube directly equals the diameter of central circular hole.

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.

Fig. 1 is the partial sectional view of the utility model embodiment;

Fig. 2 is the present embodiment front view.

See figures.1.and.2, the utility model comprises cylindrical housings 8, loam cake 1, base 9, loudspeaker 2, mediant trumpet 3,

bass horn

6,7,2 taper bass diffusers 5 of sound column face shield and 2 groups of annular bass sound mouths 4;

Bass horn

6 and 2

taper bass diffusers

5 and 2 groups of annular bass sound mouth 4 axis are positioned on cylindrical housings 3 axis, 2 taper bass diffusers 5 are bullet, the bullet vertex of a cone is relative, lay respectively at base 9 upper ends and mediant trumpet 3 lower ends, every group of annular bass sound mouth 4 is made up of 3 connection cylinders between taper bass diffuser 5 conical surfaces and cylindrical housings 8 walls respectively, bass horn 6 is between 2 groups of annular bass sound mouths 4, cylindrical housings 8 has base plate 10, there is circular hole in base plate 10 central authorities, base plate 10 upper surfaces are perpendicular to be equipped with the phase-reversing tube 11 coaxial with central circular hole, and the pore of phase-reversing tube 11 directly equals the central circular hole diameter.

The utility model adopts vertical cylindrical housing and phase-reversing tube, frequency response curve is more smooth, has especially low-frequency resonant characteristic of good frequency response, adopt conical low frequency diffuser, cooperate the bass sound mouth, low frequency directive property is expanded to some extent, and this sound column electro-acoustic conversion efficiency height, a kind of high-quality sound column of can yet be regarded as.

Claims

1, a kind of H-F sound column of high electroacoustic transfer ratio, it comprises cylindrical housings (8), loam cake (1), base (9), loudspeaker (2), mediant trumpet (3), bass horn (6), sound column face shield (7), 2 relative taper bass diffusers (5) and the 2 group annular bass sound mouths (4) coaxial with cylindrical housings (8); It is characterized in that: cylindrical housings (8) has base plate (10), and there is circular hole in base plate (10) central authorities, the perpendicular phase-reversing tube coaxial (11) that be equipped with of base plate (10) upper surface with its circular hole, and the pore footpath of phase-reversing tube (11) equates with the circular hole aperture of base plate (10).